ATMEGA88PA-AU - 8-bit 20MHz 8KB Flash MCU | Microchip
MPN: ATMEGA88PA-AU ✓ فعالATMEGA88PA-AU نمای کلی
A microcontroller unit (MCU) is a complete computing system on a single chip, combining a processor core, program memory, data memory, and peripherals. Within the power-management hierarchy of embedded systems, an MCU such as the ATmega88PA sits at the control layer, executing firmware that reads sensors, drives actuators, and communicates over serial buses. The AVR architecture, with its Harvard structure and single-cycle instruction execution, is a widely adopted 8-bit MCU family alongside Microchip's PIC and competitors such as the ST STM8.
Key differentiating features include the picoPower technology for ultra-low sleep currents, read-while-write Flash for in-system self-programming, three flexible timer/counters with compare modes, a 10-bit ADC with 8 multiplexed channels, and both I2C-compatible TWI and SPI serial interfaces. A programmable serial USART supports robust asynchronous communication at up to 20 MHz system clocks.
Technically, the AVR core executes most of its 130 instructions in a single clock cycle, achieving throughputs close to 1 MIPS per MHz. This allows designers to run at lower clock frequencies to cut power while maintaining real-time performance. Six sleep modes, including Power-down at sub-uA levels, let firmware trade responsiveness against battery drain precisely.
Typical applications include consumer appliance control panels, battery-powered sensor nodes, industrial button-and-display interfaces, and motor-controlled small systems where the ATmega88PA replaces legacy ATmega8 designs without PCB changes.
For design, remember that full 20 MHz operation requires a 4.5V to 5.5V supply, while the maximum clock at 1.8V is approximately 4 MHz per the frequency-voltage curve in the manufacturer datasheet.
This page synthesizes drop-in alternatives, application guidance, and distributor data points not consolidated in the manufacturer datasheet.
جایگزین‌های drop-in برای ATMEGA88PA-AU — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای ATMEGA88PA-AU (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Package, Serial Interfaces, Operating Temperature, Flash Memory, RoHS Status.
ATMEGA88A-AU
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATMEGA88PA-ANR
✅ جایگزین مستقیمبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATMEGA48PA-AU
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATMEGA168PA-AU
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATMEGA328P-AU
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشدهبرای قیمت تماس بگیرید
مشاهده دیتاشیت ←ATMEGA88PA-AU حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | 8-bit AVR RISC |
| Flash Memory | 8 KB (4K x 16) |
| EEPROM | 512 B |
| SRAM | 1 KB |
| حداکثر فرکانس کلاک | 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V |
| Number of I/O Lines | 23 |
| Working Registers | 32 general purpose |
| Timers/Counters | 3 (two 8-bit, one 16-bit) |
| ADC Resolution | 10-bit, 8 channels |
| Serial Interfaces | USART, SPI, TWI (I2C-compatible) |
| بسته‌بندی | 32-TQFP, 7x7 mm, 0.8 mm pitch |
| نوع نصب | Surface Mount |
| Life Cycle Stage | Active |
| Sleep Modes | 6 (incl. picoPower Power-down) |
پیکربندی پین ATMEGA88PA-AU
| پین 1 | PD3 (PCINT19/OC2B/INT1) — Port D, pin-change interrupt / Timer2 output compare B / external interrupt 1 |
| پین 2 | PD4 (PCINT20/XCK/T0) — Port D / USART external clock / Timer0 external clock input |
| پین 3 | GND — Ground |
| پین 4 | VCC — Digital supply voltage |
| پین 5 | GND — Ground |
| پین 6 | VCC — Digital supply voltage |
| پین 7 | PB6 (PCINT6/XTAL1/TOSC1) — Port B / crystal oscillator input or Timer oscillator input |
| پین 8 | PB7 (PCINT7/XTAL2/TOSC2) — Port B / crystal oscillator output or Timer oscillator output |
| پین 9 | PD5 (PCINT21/OC0B/T1) — Port D / Timer0 output compare B / Timer1 external clock |
| پین 10 | PD6 (PCINT22/OC0A/AIN0) — Port D / Timer0 output compare A / analog comparator positive input |
| پین 11 | PD7 (PCINT23/AIN1) — Port D / analog comparator negative input |
| پین 12 | PB0 (PCINT8/CLKO/ICP1) — Port B / system clock output / Timer1 input capture |
| پین 13 | PB1 (PCINT9/OC1A) — Port B / Timer1 output compare A (PWM) |
| پین 14 | PB2 (PCINT10/OC1B/SS) — Port B / Timer1 output compare B / SPI slave select |
| پین 15 | PB3 (PCINT11/OC2A/MOSI) — Port B / Timer2 output compare A / SPI master data out |
| پین 16 | PB4 (PCINT12/MISO) — Port B / SPI master data in |
| پین 17 | PB5 (PCINT13/SCK) — Port B / SPI serial clock |
| پین 18 | AVCC — ADC supply voltage (connect to VCC through LC filter) |
| پین 19 | ADC6 — ADC input channel 6 |
| پین 20 | AREF — Analog reference voltage for ADC |
| پین 21 | GND — Ground |
| پین 22 | ADC7 — ADC input channel 7 |
| پین 23 | PC0 (PCINT16/ADC0) — Port C / ADC channel 0 |
| پین 24 | PC1 (PCINT17/ADC1) — Port C / ADC channel 1 |
| پین 25 | PC2 (PCINT18/ADC2) — Port C / ADC channel 2 |
| پین 26 | PC3 (PCINT19/ADC3) — Port C / ADC channel 3 |
| پین 27 | PC4 (PCINT20/ADC4/SDA) — Port C / ADC channel 4 / TWI data line |
| پین 28 | PC5 (PCINT21/ADC5/SCL) — Port C / ADC channel 5 / TWI clock line |
| پین 29 | PC6 (PCINT22/RESET) — Port C / active-low reset input |
| پین 30 | PD0 (PCINT16/RXD) — Port D / USART receive data |
| پین 31 | PD1 (PCINT17/TXD) — Port D / USART transmit data |
| پین 32 | PD2 (PCINT18/INT0) — Port D / external interrupt 0 |
کاربردهای معمول
ATMEGA88PA-AU مناسب است برای 6 کاربردs: Battery-Powered Sensor Nodes, Appliance Control Panels, Legacy ATmega8 Design Migration, Industrial Monitoring and Interfacing, Hobbyist and Educational Prototyping, Motor and PWM Control Systems.
Battery-Powered Sensor Nodes
The ATMEGA88PA-AU's picoPower technology and six sleep modes, including sub-microamp Power-down, make it an excellent controller for battery-operated sensor nodes that must run for months or years on a coin cell or two AA cells. Firmware typically wakes the device via watchdog or pin-change interrupt, samples the 10-bit ADC, transmits over USART or SPI, and returns to sleep within milliseconds. The 1.8V minimum supply allows the node to run directly from two alkaline cells without a boost converter, and the frequency-voltage derating curve lets firmware scale the clock down to 4 MHz at end-of-discharge voltages.
پیشنهادی
Appliance Control Panels
Home appliance front panels - washing machines, cooktops, and HVAC thermostats - use the ATMEGA88PA-AU to scan keypads, drive seven-segment or LCD displays via its 23 GPIO lines, and communicate with the main board over TWI or USART. Its 20 MHz throughput (about 1 MIPS per MHz) handles real-time debounce and PWM buzzer generation easily, while the 8 KB Flash is sufficient for typical UI state machines and EEPROM storage of user settings via the 512 B EEPROM, which retains parameters across power cycles without external NVM.
پیشنهادی
Legacy ATmega8 Design Migration
Microchip application note AVR094 documents migrating ATmega8 designs to the ATmega88 family, which is pin compatible with a very similar feature set, and the ATmega88PA-AU adds picoPower efficiency on top. For manufacturers maintaining legacy boards that relied on the older ATmega8A-16AU, swapping to the ATMEGA88PA-AU keeps the same PCB footprint while extending product lifecycle on a current, actively supported die. Firmware porting is straightforward: register names largely align, and the migration note lists the handful of changed bits such as interrupt vector placement and fuse defaults.
پیشنهادی
Industrial Monitoring and Interfacing
In industrial environments, the ATMEGA88PA-AU collects analog signals - temperature, pressure, current - through its 10-bit, 8-channel ADC and reports over the industrial-standard TWI bus or opto-isolated USART links. Its 4.5V-to-5.5V full-speed window matches legacy 5V industrial logic levels, simplifying direct interfacing with 5V sensors and PLC I/O. The differential ADC input modes with 1x/8x/20x/200x gain allow direct mV-level bridge sensor measurement, and the 16-bit timer supports input-capture pulse measurement for flow meters and encoder interfaces.
پیشنهادی
Hobbyist and Educational Prototyping
The ATMEGA88PA-AU is a staple of the maker ecosystem: it shares the AVR core, ISP programming interface, and peripheral map of the famous ATmega328P used in Arduino boards, making it an ideal low-cost learning platform. Development uses Microchip Studio with AVR-GCC, or the Arduino IDE can be configured for ATmega88 boards with minor core edits. ISP programming works with inexpensive programmers, and the through-hole-friendly breakouts that hobby vendors provide for TQFP-32 parts make breadboarding practical, while datasheet-level documentation is extensive.
پیشنهادی
Motor and PWM Control Systems
With two 8-bit timers and one 16-bit timer supporting multiple PWM modes with output-compare pins, the ATMEGA88PA-AU drives DC motor H-bridges, LED dimmers, and servo outputs directly from hardware PWM, leaving CPU cycles free for the control loop. The 16-bit timer's input capture measures feedback periods from tachometers with resolution down to the 20 MHz clock tick, enabling closed-loop speed regulation. Because PWM duty cycles update synchronously with timer overflow, firmware achieves glitch-free output transitions, critical for smooth low-speed motor operation and audible-noise-free LED dimming.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای ATMEGA88PA-AU — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | ATMEGA88A-AU | ATMEGA48PA-AU | ATMEGA168PA-AU | ATMEGA328P-AU |
|---|---|---|---|---|---|
| Package | 32-TQFP (7x7 mm) | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same | 32-TQFP (7x7 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Flash Memory | 8 KB | 8 KB | 4 KB | 16 KB | 32 KB |
| SRAM | 1 KB | 1 KB | 512 B | 1 KB | 2 KB |
| EEPROM | 512 B | 512 B | 256 B | 512 B | 1 KB |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Supply Voltage Range | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V | 1.8 V to 5.5 V |
| picoPower Technology | Yes | No (standard die) | Yes | Yes | Yes |
تفاوت‌های کلیدی
- picoPower die for lowest sleep current (در مقابلATMEGA88A-AU)
- Larger firmware headroom on same footprint (در مقابلATMEGA48PA-AU)
- Cost efficiency versus larger siblings (در مقابلATMEGA328P-AU)
یادداشت‌های طراحی
Respect the frequency-voltage derating curve: 20 MHz operation requires roughly 4.5V-5.5V VCC, while at 1.8V the maximum safe clock is about 4 MHz. Running at 16 MHz from a 3.3V rail - a common mistake copied from 5V designs - can cause Flash read errors and erratic behavior. If a fixed 16 MHz crystal at 3.3V is mandatory, verify with margin testing or move to the 20 MHz rated window. Consult the manufacturer datasheet speed grade table before finalizing the clock scheme.
Provide a clean analog supply for the ADC: connect AVCC (pin 18) to VCC through an LC low-pass filter (e.g., 10 uH inductor with 100 nF ceramic at the pin) and keep the AREF (pin 20) node quiet with a 100 nF capacitor when using the internal reference. Decouple both VCC pins (4 and 6) with 100 nF ceramics placed within 2 mm of the pins. Separate the analog ground return from switching loads to preserve 10-bit ADC accuracy across the full channel set.
Fuse settings are the leading cause of field failures with AVR MCUs: accidentally disabling the RESET pin (pin 29) as GPIO or selecting the wrong clock source can permanently lock out ISP programming. Always keep the RESET pin function enabled unless debugWIRE-only reprogramming is acceptable, and enable the brown-out detector (BOD) in battery designs so Flash corruption does not occur during slow supply decay. Verify lock bits and fuses with a readback after production programming.
اطلاعات انطباق
Compliance status not stated in the retrieved web data; verify against the Microchip product page certificate of conformance. Commercial AVR MCUs are typically RoHS compliant, but this must be confirmed from official documentation.
